Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steel
Nitrogen solid solution can effectively enhance the strength of steels, but its effect on grain boundary engineering and the corrosion mechanism of steels is still unclear and systematic investigation is needed. In this study, 316LN steel specimens with five nitrogen concentrations were melted and s...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424004332 |
| _version_ | 1797247792021766144 |
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| author | Yong Wang Zhenhua Wang Wei Wang Minggui Qu |
| author_facet | Yong Wang Zhenhua Wang Wei Wang Minggui Qu |
| author_sort | Yong Wang |
| collection | DOAJ |
| description | Nitrogen solid solution can effectively enhance the strength of steels, but its effect on grain boundary engineering and the corrosion mechanism of steels is still unclear and systematic investigation is needed. In this study, 316LN steel specimens with five nitrogen concentrations were melted and subjected to compression and annealing. The grain boundary character distribution was investigated by electron backscatter diffraction. The corrosion behavior was investigated by the electrochemical polarization curves, electrical impedance spectroscopy, and X-ray photoelectron spectroscopy. The results showed that nitrogen promotes the formation of low-Σ boundaries when the pre-strain is not above 10%. The polarization resistance increases with increasing nitrogen content. The quantitative relationship between the nitrogen content and the pitting potential was obtained. Nitrogen favors the formation of oxides, hydroxides, and NH3/NH4+ on the passivated surface. The effect of planar slip on grain boundary engineering and the influence of NH4+ on the corrosion resistance are discussed. |
| first_indexed | 2024-03-07T22:00:54Z |
| format | Article |
| id | doaj.art-2f7bb3ea18ca480d831bef85ea49ce40 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:04:19Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2f7bb3ea18ca480d831bef85ea49ce402024-03-24T06:58:28ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012939763989Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steelYong Wang0Zhenhua Wang1Wei Wang2Minggui Qu3School of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, ChinaSchool of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China; Corresponding author. School of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, China.State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, ChinaShenzhen Research Institute of Yanshan University, Shenzhen, 518057, ChinaNitrogen solid solution can effectively enhance the strength of steels, but its effect on grain boundary engineering and the corrosion mechanism of steels is still unclear and systematic investigation is needed. In this study, 316LN steel specimens with five nitrogen concentrations were melted and subjected to compression and annealing. The grain boundary character distribution was investigated by electron backscatter diffraction. The corrosion behavior was investigated by the electrochemical polarization curves, electrical impedance spectroscopy, and X-ray photoelectron spectroscopy. The results showed that nitrogen promotes the formation of low-Σ boundaries when the pre-strain is not above 10%. The polarization resistance increases with increasing nitrogen content. The quantitative relationship between the nitrogen content and the pitting potential was obtained. Nitrogen favors the formation of oxides, hydroxides, and NH3/NH4+ on the passivated surface. The effect of planar slip on grain boundary engineering and the influence of NH4+ on the corrosion resistance are discussed.http://www.sciencedirect.com/science/article/pii/S2238785424004332316LN stainless steelElectron backscatter diffractionGrain boundary engineeringPlanar slipPitting |
| spellingShingle | Yong Wang Zhenhua Wang Wei Wang Minggui Qu Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steel Journal of Materials Research and Technology 316LN stainless steel Electron backscatter diffraction Grain boundary engineering Planar slip Pitting |
| title | Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steel |
| title_full | Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steel |
| title_fullStr | Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steel |
| title_full_unstemmed | Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steel |
| title_short | Effect of nitrogen content on grain boundary engineering and corrosion resistance of 316LN stainless steel |
| title_sort | effect of nitrogen content on grain boundary engineering and corrosion resistance of 316ln stainless steel |
| topic | 316LN stainless steel Electron backscatter diffraction Grain boundary engineering Planar slip Pitting |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424004332 |
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